US PATENT SUBCLASS 307 / 650
WITH NONSWITCHING MEANS RESPONSIVE TO EXTERNAL NONELECTRICAL CONDITION

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


307 /   HD   ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS

650WITH NONSWITCHING MEANS RESPONSIVE TO EXTERNAL NONELECTRICAL CONDITION {3}
651  DF  .~> Temperature responsive
652  DF  .~> Responsive to approach or passage of an object
653  DF  .~> Flame responsive (e.g., flame acts as a rectifier in circuit)

DEFINITION

Classification: 307/650

WITH NONSWITCHING MEANS RESPONSIVE TO EXTERNAL NONELECTRICAL CONDITION:

(under the class definition) Subject matter comprising an electronic circuit which has at least one nonswitching control component and is responsive to changes in external nonelectrical condition such as light, temperature, or flame and whereby an output current or voltage varies with variation of the external condition.

(1) Note. The systems defined above are to be distinguished from subject matter defining apparatus for converting nonelectrical energy directly into electric energy (e.g., electric batteries, dynamoelectric generators, etc.), condition measuring or testing apparatus which utilizes electron tubes and having means to automatically control the operation of the apparatus including means to give a qualitative or quantitative indication of the condition or change of condition, heating systems wherein an electron tube system utilized for controlling current in a heating load is controlled by a heat responsive element as a thermostat and closed loop electrical servo-type systems for positioning a servo-driven element responsive to a change in a condition.

(2) Note. Subclasses 650 through 653 pertain to circuits having nonswitching control components responsive to a nonelectrical condition, mere switching control systems responsive to external conditions have been excluded and are found in Class 307, subclasses 116+, condition responsive switching systems and Class 327, subclasses 509+, nonlinear solid-state external effects switching systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:

116, for external effects responsive switching system.

SEE OR SEARCH CLASS

73, Measuring and Testing, appropriate subclasses for systems responsive to measuring a particular condition such as 37+, for devices responsive to fluid pressure, subclasses 290+ for liquid level or depth gauge, and subclasses 570+ for devices responsive to vibration.

91, Motors: Expansible Chamber Type,

358+, for expansible chamber motors having working member position responsive feedback control.

102, Ammunition and Explosives,

211+, for fuses, primers, and ignition devices which utilizes electrical, magnetic wave, or radiant energy for proximity fuses.

122, Liquid Heaters and Vaporizers,

451+, for automatic feed means gravity, pressure or thermally controlled and subclasses 504+ for safety devices condition controlled.

128, Surgery, appropriate subclasses for electronic diagnostic apparatus responsive to some condition of the human body.

137, Fluid Handling,

87+, for self proportioning or correlating systems by specific gravity, temperature or heat content, viscosity, etc.

169, Fire Extinguishers, appropriate subclasses for systems automatically responsive to external conditions.

200, Electricity: Circuit Makers and Breakers, appropriate subclasses for switching means responsive to nonelectrical condition such as sound responsive, etc. (See 52+, and particularly subclasses 61.01 through 61.18, 80, 81, 84, and 85.)

246, Railway Switches and Signals, appropriate subclasses for electronic signaling or switching means which is controlled by the condition of the track or the position of a train on the track.

250, Radiant Energy, for methods and apparatus which may employ electron discharge tubes with a control electrode, particularly

200+, for photocell circuits and apparatus, especially subclass 214 for photocell controlled circuits in which the photocell controls an electron tube apparatus, subclasses 281+ for methods and apparatus for ionic separation or analysis (e.g., mass spectrometers), subclasses 306+ for methods and apparatus for the inspection of solids or liquids

by charged particles, and subclasses 336.1+ for methods and apparatus for the detection of nuclear or electromagnetic radiant energy or the testing of materials including fluent materials by nuclear or electromagnetic radiant energy.

290, Prime-Mover Dynamo Plants, appropriate subclasses for dynamo systems controlled by some condition of the dynamo or the prime mover therefor.

307, Electrical Transmission or Interconnection Systems, appropriate subclasses for electrical systems controlled by a nonelectrical condition, see particularly

117, 118, and 119+.

315, Electric Lamp and Discharge Devices: Systems,

82+, for head light control systems.

318, Electricity: Motive Power Systems, appropriate subclasses, particularly

445+, for electric motor automatic starting or stopping means responsive to various conditions. 320, Electricity: Battery or Capacitor Charging or Discharging, appropriate subclass for an electronic circuit in a battery or capacitor charging or discharging system that is responsive to a condition of a battery or capacitor.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, And Systems,

509+, for nonlinear solid-state external effects switching systems.

330, Amplifiers,

143, for amplifiers having a temperature responsive impedance in the circuit.

331, Oscillators,

65+, for oscillators in combination with a device responsive to external physical condition and in which the subject matter claimed recites a free running or self-sustaining oscillator system such as defined in section I of the class definition of Class 331.

337, Electricity: Electrothermally or Thermally Actuated Switches, for mechanical switches operated as a result of electrothermal and thermal action.

361, Electricity: Electrical Systems and Devices, appropriate subclasses, especially

1+, for safety and protection system; particularly subclasses

161+ for thermal control means; subclasses 173+ for photosensitive devices; and subclasses 236+ for speed controlled systems.

364, Electrical Computers and Data Processing Systems, 130+, for data processing control systems and subclasses 400+ for the application of a computer in a particular art device.

374, Thermal Measuring and Testing, appropriate subclasses for heat or temperature responsive measuring systems.

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers Circuits and Systems, for pulse counters and pulse counting systems.

378, X-Ray or Gamma Ray Systems or Devices,

44+, 51+, and 70+ for X-ray systems used in testing.

417, Pumps,

36+, for motor driven pumps controlled by a float.

431, Combustion,

78+, for an electrical circuit controlling a burner through a means sensing the presence or absence of a flame.